Initialize a long in Java

1. You should add L: long i = 12345678910L;.
2. Yes.

BTW: it doesn't have to be an upper case L, but lower case is confused with 1 many times :).

1. You need to add the L character to the end of the number to make Java recognize it as a long.

   long i = 12345678910L;
   

2. Yes.

See Primitive Data Types which says "An integer literal is of type long if it ends with the letter L or l; otherwise it is of type int."